Inspiron 5000 Series - black spots at the bottom of the screen

Just bought a Dell Inspiron 15 5000 and after just a couple of days I noticed that the screen has some odd black spots/shadows at the bottom. I guess I did not notice them before because the Windows bar was covering them.

I have the same problem even when the laptop is booting or in bios, so doesnț seem like a OS problem.

Are all 5000 Series laptops like this? Is this something standard for this laptop? Now that I noticed them I find them very very annoying.